Smoke-consuming furnace



May 18,192.6. 1,584,947 J. KELLEY SMOKE coNsUMING FURNACE Filed August 17. 1925M Patented May 18, 1926.

UNITED STATES JAMES KELLEY, F ST. LOUIS, MISSOURI.

SMOKE-CONSUMING FUR/NACE.

Application 1ed Angust 17, 1925. Serial No. 56,791.

My invention relates .to smoke consuming furnaces, and, itis a distinct and practica improvement to Overcome certain practical` objections to, and defects in, furnaces of the smoke consumer type.

,The object of my present invention is to provide a furnace structure withits parts so arranged as to consume the smoke from the fuel within its own bounds by forced 1o Circulation through the furnace structure such number of timesfas are suflicient to consume all of the smoke and combustible gases generated, thus obviating the necessity of the usual smoke stack, or chimney for the furnace structure. f

With the above and other objects in view, the invention consists in the novel features of construction, arrangement and combination of parts hereinafter more fully described and finally pointed out in the'claims hereto appended.

Referring to the accompanying drawings forming a part of this specification, wherein like characters of reference denote similar parts throughout the several views:

Fig. 1, is a longitudinal verticalsectional view of a furnace structure embodying the features-of my invention.

Fig. 2, is a detail of the perforated bridge a0 wall.

Referring to the accompanying drawings, the reference character 1 represents a furnace casing, 2 a tubular boiler, 3 thffire-box M and 4 the ash-pit of the average furnace 85 construction.

A hollow bad ve wan A is disposed within-f the casing 1 an comprises a front wall 5 from which extend` a grate 6 and a rear wall 7 spaced to the rear of the wall 'to provide the smoke passa' e 8. 'The rear wall 7 of the bridge-wall is igher than the front wal1'5 and the passage is capped with the top inclined wall 9 to provide the upper f'combustion chamber 9', A bale wall 10 is disposed to the rear of the rear wall 7 of the bridge wall A and spaced'a suitable distance therefrom to provide the passage 11 between the. bafe wall and-the bridge wall -and to provide the real,` combustion chamber 9. It will be here observed, that the baie wall 10 is of the same height as the rear wall 7 of the hollow bridge wall A, so as to cause smoke passing upwardly between the bridge wall and the baille wall to `be drawn into the path of the flames from the fire-box 3 for ourning the smoke and gases at the point of very best advantage, as is manifest.

The rear wall 7 of the hollow bridge vwall 'A is provided with a plurality of horizontally disposed smoke passages or fines 'l2 which communicate' on one side/with the bridge wall smoke passage 8 and at t-he other side with smoke passage 11 between the hollow bridge wall and the baille wall.

A suitable fiue cap smoke housing 13 is applied to one'end of the boiler 2 and it is directed upwardly a suitable distance above the -boiler 2,.l A suitable Smoke intake conduct 14 is directed donwardly from the upper end ofthe liue cap smoke housing 13 to the top of a suitable fan housing 15 disposed upon thevfloor of the furnace room, A suitable propeller 16 is rotatably mounted 1n the fan housing 15 and it can be driven by any suitable motive power, such as a small engine, electric motor, or the like, as is manifest. A smoke dischargeAconduct 17 `is'di rected from one side of the fan housing l5 to the lower end of the smoke assage 8 between the walls 5 and 7 of t e hollow bridge wall A.

. A plurality of suitable air inlet openings 18 are provided in the'conduct 14 close to the fan housing and controlled by suitable means such forinstance as a sleeve 19. The conduct 14 is further provided with a suitable damper 20 located above the air inlet openings 18.

A suitable vent pipe 21 is directed upwardly a suitable distance from the flue cap smoke housing 13 and it is provided at its upper open end with a closure cap 22 which is opened by means of a cable 23 running' over a suitable pulley wheel `24. This vent pipe can be opened when the furnace is being shut down, but before opening the vent pipe the bed of fuel should be burnt to incandescent coals and not leaving much gas in the furnace. i

The reference character 25 represents a pipe leading from the steam chamber of the boiler 2 to the return or discharge smoke conduct 17 just beforev it enters the smoke passage 8 in the hollow' bridge wall A- so that a quantity of live steam may be blown into the hollow bridge wall which is often necessary if the air linlet openings 18 are opened between the flue cap housing and the fan housing so as tol warm up the current of gases passing back into the combustion chambers of the furnace'so as to be consumed therein, thus obviating the necessity of costly smoke stacks and also abating the smoke nuisance and leaving the atmosphere free from smoke discharges.

In the operation of my furnace, lit will be observed,`that the unconsumcd products of combustion and also the escaping gases from the fire box will pass through the combus-V tion chamber over and to the rear of the hollow bridge wall 'and baHle wall and then pass through the boiler tubes into and .upwardly in the flue cap smoke housing, then downwardly through the smoke delivery pipes 14, then through the fan housing 15 for delivery into the smoke clelwery pipe 17, then into the hollow bridge wall from where it escapes through openings 18 into the passage between the hollow bridge wall A and the baille wall 10 from where it finally enters again linto the combustion chambers, at a point where it is consumed, partially at least, by the hot llames from the tire box in their travel over the hollow bridge wall and the baille wall to and through the combustion chambers. rl`his cycle of travel is repeated until all the particles of combustion and the gases are consumed so that there is nothing left to be directed into the atmosphere to contaminate the same.

rfhe many advantages of the herein described invention will readily suggest themselves to those skilled`in the art to which it appertains.

I do not desire to be understood as limiting myself to the exact details of construction and arrangement of parts as herein described and illustrated, as it is manifest that variations and modifications may be made without departing from the spirit and scope of my invention and the terms of the following claims, hence I wish it to be understood that I reserve the right to malte any such changes, or modifications as may fairly fall within the scope of the appended claims when fairly construed.

What. I claim is: f

1.111 a self smoke consuming furnace, a furnace casing, a return tubular boiler mounted in said casing, a. hollow bridge wall having openings in its rear wall, a grate directed forwardly from said bridge wall with an ash pit therebelow and a combustion chamber to the rear of said bridge wall, a

flue cap housing applied to one end of the tubular boiler, a vent pipe directed upwardly to the atmosphere from said flue cap housing, a smoke conduct directed downwardly from the upper end of said flue cap housing, a damper for said conduct, a fan housing at the lowerI end of said conduet, rotatable fan blades within said fan housing, said conduct having air openings between the damper and the fan housing, a conduct extending from the fan housing to theI hollow bridge wall, a batlle wall positioued lo the rear of said hollow bridge wall and extending upwardly to a position even with the top of the hollow bridge wall so as to direct the uncousumed. smoke and gases into the path of the flames from the fire box as they enter the combustion,chamber and a movable cap for said vent pipe.

2. In a self smoke consuming furnace, a furnace casing, a return tubular boiler mounted in said casing, a hollow bridge wall having openings in its rear wall, a grate directed forwardly from Said bridge wall with an ash pit therebelow and a combustion chamber to the rear of said bridge wall, a flue cap housing applied to one end of the tubular boiler, a vent pipe directed upwardly to the atmosphere from said 'lue cap housing, a smoke conduct directed downwardly from the upper end of said flue cap housing, a damper for said conduct, a fan housing at the lowcn end of said conduct, rotatable fan blades within said fan housing, said conduct having air openings between the damper and the fan housing, a conduct extending from the fan housing to the hollow bridge wall, a baille wall positioned to the rear of said hollow bridge wall and extending upwardly to a position even Awith' the top of the hollow bridge wall so as to direct the unconsumed smoke and gases into the path of the flames from the lire box as they enter the combustion chamber, a movable cap for said vent pipe and a steampipe leading from the boiler to the smoke' duct leading from the fan housing to the hollow bridge wall and said steampipe entering said conduct at a point close to the hollow bridge wall. l

In testimony whereof, I have hereunto signed my name to the specification.

JAMES K ELLE Y. 

